//实现Callback接口的实现类
package com.callback2;
/**
 * 1.创建代办
 * 2.发送oa
 * 3.发送e家
 *
 * */
public class MyCallback implements Callback {
    @Override
    public void process(String msg) {
        System.out.println("回调：" + msg);
    }
}
